HDI is a better indicator than GDP because HDI is a composite (social and economic) indicator that gives a country a score based on the average life expectancy, education and income. Wealth can be very unevenly distributed, therefore, in some country's wealth goes to a few, whereas others spend their limited wealth on health and education, benefiting everyone. Whereas GDP is just an economic indicator, measuring the total value of goods and services produced by a country in a year, because it is an average, it can hide extremes.